The Gauge Controller Registry empowers the community to have an active role in the platform's governance and expansion. By allowing the listing of insurance pool PODs (Proof of Deposit) that currently exist in the Neptune Mutual marketplace, the Gauge Controller Registry ensures some of these pools are eligible to receive a portion of the NPM token block emissions as incentives.

Each month, the Neptune Mutual community comes together to cast their votes on proposals, determining which insurance pools should be allocated NPM emissions. This critical voting process unfolds through a decentralized Snapshot governance portal, guaranteeing transparency, fairness, and active community involvement in the decision-making. Once the community reaches a consensus, the GaugeControllerRegistry contract is updated on-chain using the setGaugefunction to reflect the new allocations accurately.

The gamified aspect of gauge voting introduces an element of excitement and engagement for the participants. It aligns the interests of the community with the platform's growth and success by encouraging users to become more actively involved. This innovative process allows third-party protocols to maximize their decentralized cover protection by incentivizing veNPM token holders to redirect a larger share of NPM token emissions to their insurance pools.

To achieve this, third-party protocols can offer their native tokens as rewards to veNPM token holders. This strategy not only encourages more NPM token emissions to be directed to their pool but also attracts more liquidity providers. As a result, the insurance pool becomes more robust, benefiting all stakeholders within the Neptune Mutual ecosystem.

The Gauge Controller Registry and its associated voting process play a vital role in fostering a dynamic, thriving, and interconnected ecosystem. By enabling users to vote on the allocation of NPM token emissions, Neptune Mutual creates a system that promotes long-term commitment, collaboration, and synergy between various protocols and projects within the DeFi space.

This democratic approach to governance ensures that the platform remains responsive to the needs of its users, allowing for adjustments and improvements as the DeFi landscape evolves. The gauge voting process also serves as a catalyst for innovation, enabling third-party protocols to find creative ways to engage and reward veNPM token holders in return for support and increased liquidity.

IGaugeControllerRegistry Interface Summary#

// Neptune Mutual Protocol (https://neptunemutual.com)
// SPDX-License-Identifier: BUSL-1.1
pragma solidity ^0.8.12;

import "../../dependencies/interfaces/IVault.sol";

interface IGaugeControllerRegistry {
  struct PodArgs {
    IVault pod;
    uint256 lockupPeriodInBlocks;
    uint256 ratio;
  }

  struct PoolSetupArgs {
    string name;
    string info;
    uint256 platformFee;
    PodArgs staking;
  }

  struct Gauge {
    bytes32 key;
    uint256 emissionPerBlock;
  }

  function addOrEditPool(bytes32 key, PoolSetupArgs calldata args) external;
  function setGauge(uint256 epoch, uint256 amountToDeposit, Gauge[] calldata distribution) external;
  function withdrawRewards(bytes32 key, uint256 amount) external;
  function deactivatePool(bytes32 key) external;
  function activatePool(bytes32 key) external;
  function deletePool(bytes32 key) external;

  function isValid(bytes32 key) external view returns (bool);
  function isActive(bytes32 key) external view returns (bool);
  function get(bytes32 key) external view returns (PoolSetupArgs memory);
  function sumNpmDeposited() external view returns (uint256);
  function sumNpmWithdrawn() external view returns (uint256);
  function getLastEpoch() external view returns (uint256);
  function getEmissionPerBlock(bytes32 key) external view returns (uint256);
  function getAllocation(uint256 epoch) external view returns (uint256);

  event GaugeControllerRegistryOperatorSet(address previousOperator, address operator);
  event GaugeControllerRegistryRewardsWithdrawn(bytes32 key, uint256 amount);
  event GaugeControllerRegistryPoolAddedOrEdited(address indexed sender, bytes32 indexed key, PoolSetupArgs args);
  event GaugeControllerRegistryPoolDeactivated(address indexed sender, bytes32 indexed key);
  event GaugeControllerRegistryPoolActivated(address indexed sender, bytes32 indexed key);
  event GaugeControllerRegistryPoolDeleted(address indexed sender, bytes32 key);
  event GaugeSet(uint256 indexed epoch, uint256 distribution);
  event GaugeAllocationTransferred(uint256 indexed epoch, uint256 totalAllocation);

  error InvalidGaugeEpochError();
  error PoolNotFoundError(bytes32 key);
  error PoolNotActiveError(bytes32 key);
  error PoolDeactivatedError(bytes32 key);
  error PoolAlreadyDeactivatedError(bytes32 key);
  error PoolNotDeactivatedError(bytes32 key);
  error PoolAlreadyActiveError(bytes32 key);
  error PoolAlreadyExistsError(bytes32 key);
}

function initialize(address contractOwner, IStore protocolStore) external#

This function initializes the contract with the provided contract owner and protocol store address. It can only be called once, during the contract deployment.

function addOrEditPool(bytes32 key, PoolSetupArgs calldata args) external#

This function allows the contract owner to add a new pool or edit an existing one. If the pool already exists, only the name and platform fee can be edited. If the pool is being added, all fields in the PoolSetupArgs must be provided.

It will throw an error if:

• The contract is paused
• The provided pool key already exists when adding a new pool
• The provided pool key does not exist when editing an existing pool
• The pool is not active when editing an existing pool
• The provided pool name is empty when adding a new pool
• The provided pool POD address is a zero address when adding a new pool

function setGauge(uint256 epoch, uint256 amountToDeposit, Gauge[] calldata distribution) external#

This function allows the contract owner to set the gauge for an epoch with the provided amount to deposit and the distribution of the emissions per block for each pool. It can only be called by the contract owner.

It will throw an error if:

• The epoch number is 0 or not equal to the previous epoch number plus 1
• The total emissions per block in the distribution is greater than the amount to deposit

function withdrawRewards(bytes32 key, uint256 amount) external#

This function allows an operator to withdraw the specified amount of rewards from the pool with the provided key. It can only be called by an operator.

It will throw an error if:

• The contract is paused
• The caller is not a protocol member
• The pool with the provided key does not exist

function deactivatePool(bytes32 key) external#

This function allows the contract owner to deactivate a pool with the provided key. It can only be called by the contract owner.

It will throw an error if:

• The contract is paused
• The pool with the provided key does not exist
• The pool with the provided key is already deactivated

function activatePool(bytes32 key) external#

This function allows the contract owner to activate a pool with the provided key. It can only be called by the contract owner.

It will throw an error if:

• The contract is paused
• The pool with the provided key does not exist
• The pool with the provided key is already active

function deletePool(bytes32 key) external#

This function allows the contract owner to delete a pool with the provided key. It can only be called by the contract owner.

It will throw an error if:

• The contract is paused
• The pool with the provided key does not exist
• The pool with the provided key is active

function setOperator(address operator) external#

This function allows the contract owner to set the operator address. It can only be called by the contract owner.

It will throw an error if:

• The contract is paused
• The provided operator address is not already a protocol member

function isValid(bytes32 key) external view returns (bool)#

This function returns true if the pool with the provided key is valid, and false otherwise.

function isActive(bytes32 key) external view returns (bool)#

This function returns true if the pool with the provided key is active, and false otherwise.

function get(bytes32 key) external view returns (PoolSetupArgs memory)#

This function returns the PoolSetupArgs struct for the pool with the provided key.

function sumNpmDeposited() external view returns (uint256)#

This function returns the total amount of NPM tokens deposited across all epochs.

function sumNpmWithdrawn() external view returns (uint256)#

This function returns the total amount of NPM tokens withdrawn across all epochs.

function getLastEpoch() external view returns (uint256)#

This function returns the last epoch number for which a gauge was set.

function getAllocation(uint256 epoch) external view returns (uint256)#

This function returns the allocation of NPM tokens for the provided epoch number.

function getEmissionPerBlock(bytes32 key) external view returns (uint256)#

This function returns the emission per block for the pool with the provided key.

function recoverEther(address sendTo) external#

This function allows the contract owner to recover any Ether stuck in the contract. It can only be called by the contract owner.

function recoverToken(IERC20Upgradeable malicious, address sendTo) external#

This function allows the contract owner to recover any ERC20 tokens stuck in the contract. It can only be called by the contract owner.

function setPausers(address[] calldata accounts, bool[] calldata statuses) external#

This function allows the contract owner to set the pauser status of multiple accounts. It can only be called by the contract owner when the contract is not paused.

It will throw an error if:

• The contract is paused

Errors#

The contract may throw the following errors:

1. AccessDeniedError: Thrown when the caller does not have the required access level (e.g., owner, operator, or pauser).
2. BalanceInsufficientError: Thrown when the amount to deposit is less than the total required for gauge allocations.
3. EmptyArgumentError: Thrown when an empty argument is provided to a function that requires a non-empty value.
4. InvalidGaugeEpochError: Thrown when an invalid epoch is provided to the setGauge function.
5. PoolAlreadyActiveError: Thrown when attempting to activate an already active pool.
6. PoolAlreadyDeactivatedError: Thrown when attempting to deactivate an already deactivated pool.
7. PoolAlreadyExistsError: Thrown when attempting to add a pool that already exists.
8. PoolDeactivatedError: Thrown when attempting to edit a deactivated pool.
9. PoolNotFoundError: Thrown when attempting to interact with a pool that does not exist.
10. PoolNotActiveError: Thrown when attempting to set a gauge for an inactive pool.
11. PoolNotDeactivatedError: Thrown when attempting to delete a pool that is not deactivated.
12. ZeroAddressError: Thrown when a zero address is provided to a function that requires a non-zero address.

Events#

The contract emits the following events:

1. GaugeAllocationTransferred: Emitted when a gauge allocation is transferred.
2. GaugeControllerRegistryOperatorSet: Emitted when the operator is set.
3. GaugeControllerRegistryPoolActivated: Emitted when a pool is activated.
4. GaugeControllerRegistryPoolAddedOrEdited: Emitted when a pool is added or edited.
5. GaugeControllerRegistryPoolDeactivated: Emitted when a pool is deactivated.
6. GaugeControllerRegistryPoolDeleted: Emitted when a pool is deleted.
7. GaugeControllerRegistryRewardsWithdrawn: Emitted when rewards are withdrawn.
8. GaugeSet: Emitted when a gauge is set for a pool.

Modifiers#

The contract includes the following modifiers:

1. onlyOperator: Restricts a function to be called only by the contract operator.
2. whenNotPaused: Restricts a function to be called only when the contract is not paused.